cairo/BUGS

Splines are not dashed.

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The polygon tessellation routine has problems. It appears that the
following paper has the right answers:

	http://cm.bell-labs.com/cm/cs/doc/93/2-27.ps.gz

	[Hobby93c] John D. Hobby, Practical Segment Intersection with
	Finite Precision Output, Computation Geometry Theory and
	Applications, 13(4), 1999.

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Stroking a self-intersecting path generates the wrong answer, (in
mostly subtle ways). The fix is to tessellate a giant polygon for the
entire stroke outline rather than incrementally generating trapezoids.

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Cairo is crashing Xnest with the following message:

X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  72 (X_PutImage)
  Serial number of failed request:  28
  Current serial number in output stream:  29

confirmed on a quite default install of debian unstable.

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cairo_scale_font modifies objects that the user expects to not change. For example:

	cairo_font_t *font;

	cairo_select_font (cr, "fixed", 0, 0);
	font = cairo_current_font (cr);
	cairo_scale_font (cr, 10);
	cairo_show_text (cr, "all is good");
	cairo_set_font (cr, font);
	cairo_scale_font (cr, 10);
	cairo_show_text (cr, "WAY TOO BIG!!);

We could fix this by not storing the scale in the font object. Or
maybe we could just force the size to its default after set_font. Need
to think about this in more detail.

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cairo_show_text is not updating the current point by the string's advance values.

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Caps are added only to the last subpath in a complex path.

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ref_counts will go negative if destroy is called with ref_count ==
0. We noticed this in cairo_surface.c but it likely happens in several
places.

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Patterns are broken in various ways. The SVG test case demonstrates
some regressions, so something has changed in cairo. Also,
transformation plus repeat doesn't work in either Xrender or
libpixman, (nor in glitz?).